--- a/thermferm/thermferm.c Sun Feb 15 18:18:44 2015 +0100
+++ b/thermferm/thermferm.c Sun Feb 15 18:21:20 2015 +0100
@@ -1335,7 +1335,6 @@
unit->PID_I_err = 10.0;
P_err = err;
D_err = err - unit->PID_err_old;
- unit->PID_err_old = err;
/*
* A postive value means heating, a negative value cooling.